Stray Multiqubit Interactions in Quantum Processors

Unintended interactions between qubits, known as stray couplings, negatively impact gate operations, leading to errors[1,2,3]. This poster highlights the significance of incorporating the lattice Hamiltonian into quantum circuit design and operation. By comparing the intensity of three-body versus two-body stray couplings, we identify non-trivial circuit parameter domains that help to enhance fidelity of two-qubit gates, particularly beyond dispersive regime. Additionally, we demonstrate instances where three-body ZZZ interactions surpass two-body ZZ interactions within the parameter space relevant to quantum computing, indicating the potential use of lattice Hamiltonian for designing novel multi-qubit gates essential for advancing quantum computing technologies.